Hi, Am new to the forum but have been reading with great interest all the advice, esp from Nemrod and co. I'm from Singapore and am about to get the Fix housing for my s95, together with the Fix UWL-04 for wide angle photography. As Nemrod has clearly advised, the UWL-04 doesn't vignette if attached to the Fix 90 housing using the 52mm apaptor. I'm assuming the Fix 95 housing would be similar to the Fix 90 (esp the lens port) so my burning questions are these: What is the diameter of the lens port? Is it 67mm or 52mm? If it's 52mm, why do we need the 52mm adaptor to fit the UWL-04? Is it because of male/female compatibility of the lens and port? Is the 52mm adaptor made by Fix? What is the difference between the cheap ($35) one and the expensive ($190) one? Hope my questions make sense and am grateful for replies. Thanks!